refer to the figire.
(a) express x in terms of y,
(b) express y in terms of x.
圖.
http://hk.myblog.yahoo.com/ylf6b05/article?mid=40
math f.2
2009-07-22 9:21 pm
回答 (1)
2009-07-22 9:46 pm
✔ 最佳答案
其實唔太難。三角形三個內角總和為 180 度。
所以︰ ( 180 - x ) + (180 - y) + 90 = 180
180 - x + 180 - y + 90 = 180
450 - x - y = 180
450 - 180 = x + y
270 = x + y
x = 270 - y
y = 270 - x
參考: me
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